1除以111的商的小数部分第15位数字是0______．

如果在江河湖泊发现有人溺水，我们中学生[ ]

A．应该马上下水救人 　　　       

B．要量力而行，不要贸然下水　　　

C．如果是陌生人就不冒险救助   　 

D．珍惜自己的生命，谁都不救助

患者，女，40岁，多尿2年，腰痛、肉眼血尿1天。因头痛长期服用止痛剂10余年。BP：135／85mmHgESR10mm／h，尿常规：尿蛋白（+），WBC（+），少量颗粒管型，X光片可见肾 * * 坏死征象。血糖、肝肾功能、电解质、血常规结果均在正常范围内。最可能的诊断是（）。

A.慢性肾盂肾炎、肾 * * 坏死

B.慢性间质性肾炎、肾 * * 坏死

C.急性肾小球肾炎、肾 * * 坏死

D.慢性肾小球肾炎、肾 * * 坏死

E.急性间质性肾炎、肾 * * 坏死

短文填空,用所给单词的适当形式完成短文

If you don’t keep yourself  warm enough, winter can 小题1:   (be) a time of illness. During the winter months, people easily get colds and flu (流感). Many think they are the same, but these two illnesses are different.

Colds can stay with you for up to a week. You will have a   小题2:     (run) nose, sore throat, headache, cough and a fever.

Flu is more serious. You will feel sick very quickly. You    小题3:(have) a fever and a headache. Your body will hurt and  become  weak. This could last for up to four weeks.

Is there any way  小题4:(keep) yourself away from colds and flu?

Try    小题5:    (not touch) (触摸) your nose or eyes if you have been close to someone who has a cold. Wash your hands, especially after    小题6:   (clean) your nose. ____小题7:_____(go) out with wet hair can also give you a cold!

If you catch a cold or flu,   小题8:  (go) to bed and rest. Doing this   小题9: (help) you get better. Drink lots of water. Stay in a warm, well-aired room. If you have a headache, or your muscles hurt,  小题10:  (take) some medicine.

挂着标语的氢气球在太阳光的照射下，温度升高，体积膨胀．气球受到的重力______，气球受到的浮力______•（均选填“增大”“减小”或“不变”）

城市生态系统的主要特征有哪些？